Feeding apparatus for rotary printing machines



P 1951 L. H. CHEESEMAN ETAL 86 FEEDING APPARATUS FOR ROTARY PRINTINGMACHINES 3 Sheets-Sheet 1 Filed Jan. 26, 1959 INVENTORS LasLiz H.Cncesemm m FREDERiCK [lineman B ffm 4r 36w ATTORNEYS p 1961 L. H.CHEESEMAN, ET AL 2,999,686

' FEEDING APPARATUS FOR ROTARY PRINTING MACHINES Filed Jan. 26, 1959 5Sheets-Sheet 2 INVENTOR: Lesu': H. Cuzessmmi m FRiDERiCK E. LiNcARD YEek-{Em i W 36m ATTORNEYS FEEDING APPARATUS FOR ROTARY PRINTING MACHINES3 Sheets-Sheet 5 Filed Jan. 26, 1959 INVENTORS n M m M" 01 W M M 5 S .W4. H1 N H CH M K IW H A R 1 E 9 u w m s Uiliifil 2,999,686 FEEDINGAPPARATUS FOR ROTY PRINTING MACHINES This invention relates to rotaryprinting machines of the kind in which, in operation, the top sheet of astack of sheets of paper is periodically fed, through the intermediaryof suction pad means, to printing rolls of the machine. Drivingmechanism is provided for appropriately rotating the rolls, the suctionpad means being connected to be moved by the driving mechanism.

According to the present invention there is provided a machine of thekind referred to comprising a slide, a first upwardly extending guidewayand a second substantially horizontally extending guideway, the twoguideways intersecting and the slide being arranged for movement alongthe guideways, the suction pad means being connected to move with theslide which latter is arranged to be driven from the driving mechanism,the arrangement being such that in feeding the top sheet from the stackto the printing rolls, the slide first moves upwardly along the firstguideway whereby the suction pad means lift and then moves horizontallyalong the second guideway whereby the suction pad means move towards theprinting rolls, the slide and suction pad means being subsequentlyreturned to their initial position.

For a better understanding of the invention and to show how the same maybe carried into effect reference will now be made to the drawingsaccompanying the specification, in which:

FIGURE 1 is a diagrammatic side elevation of parts of a duplicatingmachine,

FIGURE 2 is a perspective view of linkage that drives the sheet feedingmechanism of the duplicating machine of FIGURE 1,

FIGURE 3 is a perspective view of the sheet feeding mechanism, the viewbeing taken from the side opposite to that of FIGURE 2,

FIGURE 4 is a perspective view of part of the sheet feeding mechanism,

FIGURE 5 is another perspective view of the sheet feeding mechanism, theview being taken from the opposite side to that of FIGURE 3,

FIGURE 6 is an elevation of a detail of the sheet feeding mechanism, and

FIGURE 7 is an elevation of another detail of the sheet feedingmechanism.

General arrangement of the duplicating machine The duplicating machineto which the sheet feeding mechanism of the present invention isapplied, is of generally known form and essentially consists of a mastercylinder 1 around the surface of which a plate or stencil 2 to beduplicated is secured. The master cylinder cooperates with an inkingroller 3 to which ink is applied by any suitable known means (notshown). The master cylinder 1 also cooperates with a blanket cylinder 4and this in turn cooperates with a platen 5. Feed rollers 6 and 7 areprovided adjacent the bite between the blanket cylinder 4 and the platen5. The rollers 7 are carried on a shaft 8 pivotally mounted on a pivotedframe 9. The frame 9 is pivoted in such a way that at the appropriateinstant in the cycle of operations of the duplicating machine, therollers 7 move downwardly towards the rollers 6 to grip the leading edgeof any sheet inserted between States Patnt Patented Sept. 12, 1961 therollers 6 and 7. Driving mechanism (not shown) is provided for drivingthe cylinders 1 and 4, the platen 5 and the rollers 3 and 6. A table 10supports a stack of paper sheets 11 the table 10 being mounted forvertical movement and being provided with racks 12 (one behind the otherin FIGURE 1) that cooperate with gear wheels 13 (also one behind theother in FIGURE 1). The gear Wheels 13 are rotated by mechanism to bedescribed hereinafter for raising the table 10 and the stack of sheets11. Two suction pads 14 (one behind the other in FIGURE 1) are eachsupported by a foot 15 fixed to a cross-shaft 16. Flexible tubing 17connects each foot 15 and thus each pad 14 to the suction side of a pump(not shown).

The blanket cylinder 4 is mounted on a shaft 18 having an eccentric 19fixed thereto. An eccentric strap 20 having a projecting arm 21cooperates with the eccentric 19. A pin 22 on a lever 23 which ispivoted at 24 is located in a recess 25 formed in the under side of thearm 21.

A shelf 26 is disposed adjacent the cylinder 4 and platen 5, forreceiving printed sheets 27. The shelf 26 is provided with an end stop28 and two laterally spaced plate-like side guides 29.

The lever 23 is connected by mechanism to be described hereinafter, tothe shaft 16 to control the movement of the suction pads 14. Inoperation of the duplicating machine, rotation of the cylinder 4 causesoscillation of the lever 23 through the intermediary of the eccentric 19and strap 20 whereby the suction pads 14 lift the top sheet 11 from thestack and then advance this sheet to the rollers 6 and 7. The path ofmovement of the pads 14 is indicated by the dotted line 30. When theleading edge of the sheet is between the rollers 6 and 7, the rollers 7are swung downwardly so that the leading edge of the sheet is grippedbetween the rollers 6 and 7. The roller 6 rotates, and the rollers 7being freely mounted in the frame 9 likewise rotate and the sheet isadvanced to the bite between the cylinder 4 and the platen 5. Thestencil or plate 2 on the master cylinder 1 is inked by the roller 3 andan inked impression is formed on the surface of the cylinder 4. Thisimpression is transferred from the cylinder 4 to the sheet and theprinted sheet is ejected from the bite between the cylinder 4 and theplaten 5 onto the shelf 26.

Suction pad drive The lever 23 (FIGURES 2 and 3) is carried at its upperend by a cross-shaft 31 which is pivotally mounted in side plates 32 and33 of the machine. The lower end of the lever 23 is pivotally connectedto a curved link 34. In its under side the link 34 has a notch 35, oneside 36 of which is inclined and the other side 37 being substantiallynormal to the under side of the link 34. A roller 38 cooperates with theupper surface of the link 34, the roller being carried at the upper endof an arm 39 the lower end of which is pivotally secured to one end of alever 40 that is pivoted to the side of the machine at 41. The other endof the lever 40 carries a pin 42 located in a slot 43 formed in a link44.

- The lower end of a spring 45 is secured to the lever 40 and the upperend of the spring 45 is secured to a pin 46 fixed to the side of themachine. The spring 45 urges said one end of the lever 40 upwardly.

A pin 47 on the arm 48 which is pivoted to the side of the machine at 49cooperates with the notch 35 of the link 34. There are two arms 48 oneon each side of the machine, the two arms being secured together by across-bar 50. One end of an arm 51 is pivotally secured to each arm 48and the other ends of the arms 51 are connected together by the shaft16. Said one end of the arms 51 are rigidly connected'together by across; shaft 52. The shaft 16 is rotatably carried by the arms 51 andhas fixed thereon at one end a square slide 53 and carries at the otherend a roller 54 (FIGURE 4). The roller 54 operates in a groove 55 formedin a guide plate assembly 56 which is effectively secured to the sideplate 33. A guide plate assembly 57 which isielfectively fixed to-theside plate 32 has ahorizontal guideway 58 in which slides azblock 59.From the under side of the block 59 a square recess 60. is formedtherein for receiving the slide 53. The assembly 57; also has a verticalguideway 61 for receiving the slide 53. A stop 62 limits rearwardmovement. ofv the, block 59 in the guideway 58.

It will be seen. from FIGURE 3 that the feet 15 are rigidly secured, tothe shaft 16 by locking screws 63.

The link 44 is-connectedrto a manually operated sheet feed controlmember. (not shown). With this control member in the inoperativeposition the parts assume the position shown in FIGURE 2. When thecontrol member is operated to effect sheet feeding, thelink 44 is liftedso that the pin 42 engages with. the lower end of the slot 43 wherebythe roller- 38 is caused to bear firmly on the upper surface of the link34.

The mechanism so far described in connection with FIGURES 2; 3 and 4:operates. as follows. With the link 44 in the position shown;oscillation of the lever 23 causes the link 34 to be movedj bodilybackwards and forwards. As, however, the roller- 38 bears only verylightly on the upper surfaceof the link 34 with the-parts in theposition shown in FIGURE 2, the side 36 rides up the pin 47 whenthe-link 341 is being moved backwardly whereby the link 34- lifts and nomovement is imparted to the 81131348. When the control member (notshown) is operated to lift the'link: 44 the roller '38 bears heavily onthe upper surface ofthe link 34 and as the latter is moved backwardly bythe lever 23 the pin 47 does not ride out, of. the notch 35; so that thearms 48 are caused to oscillate.- Assumethat the link 34 is in its mostrearwardposition, then the slide 53 will be at its lowest point in theguideway 61. The roller 54 will be in the position shown in FIGURE 4.Forward movementof the link 34 swingsthe arms 48 about their pivots 49and the slide 53 moves up-the guideway 61 into the recess 60 in theblock59; the arms 51 pivoting relative to the arms48. This movement of theslide 53 causes the shaft 16 and thus. the suction pads- 14- to risevertically. Continued forward movement ofthe link 34 continues themovement of the arms 48 and the block 59 with the slide 53 contained in.the recess 60 slides along the guideway 58 until the forward swingingmovement of the arms 48 ceases. The'movement that is thus imparted tothe slide 53 moves the shaft 16 and the suction pads 14 horizontally tothe position where any sheet 11 carried by the pads 14 is positioned forgripping by the feed rollers 6 and 7'. Reverse movement of the link 34,i.e. rearward movement thereof, returns the parts to their initialposition.

Stack level control The table 10 (FIGURE has a rearwardly extending lug64 at each side-thereof. Only one such lug 64 is visible in FIGURE 5. Arod 65- is connected between the two lugs 64. Side members 66 resting onthe table are each provided with a boss 67 adjustably secured to the'rod65 by a thumb screw 68. The side members 66 each consist of ahorizontally disposed strip portion 69, a vertical strip portion 70which extends upwardly from one end of the Strip portion 69, and a stripportion 71 that extends downwardly from the other end of the portion 69.The side members 66 serve to locate the sides of the stack of papersheets 11 on the table 10; The positions ofthe members 66 laterally ofthe table top are,- of course; adjusted in accordance with the width ofthe paper sheets. A back stop 72 in the form of a vertical strip isprovided for locating the rear of the stack of paper, the front of thestack being guided by a plate 73 (FIGURE 1) fixed to the main body ofthe machine. The stop 72' is secured on one end of a rod 73A the otherend of which is adjustably secured by means of a thumb screw 74 to abracket 75 having a boss 76 through which the rod 65 is passed. The rod65 has a groove 77 therein with which a spring-loaded plunger 78 carriedby the bracket 75 engages. The plunger 78 is shown in the engagedposition in FIGURE 5. When the plunger 78 is withdrawn the bracket 75can be swung downwardly whereby the stop 72 is removed from the vicinityof the table 10 and a fresh stack of paper canbe placed on the table 10.

The table 10 is supported at. each side by a hori zontal flange 79(FIGURE 6) at the top of a T-piece 80. Each T-piece 80 carries tworollers 81which are disposed one above the other in a slot 82 formed inan adjacent side plate 83 of the machine. The four rollers 81, two oneach side of the machine, guide the table 10 for vertical movement.There is one rack 12 associated with-each T-piece 80. Each rack 12 isdisposed between the adjacent. T-piece 80 and the adjacent side plate83, the rack being secured to the T-piece. Each rack 12 cooperates withits associated gearwheel 13 and these gearwheels are mounted on a shaft'84. A ratchet wheel (FIGURES 5 and 7) is releasably secured to theshaft 84. The connection between the ratchet wheel 85 and the shaft 84:is controlled by a release knob 86. In the normal operating position theratchet wheel 85 is connected to drive the shaft 84. When, however, theknob 86 is pushed inwardly (against spring opposition) the ratchet wheel85 is disconnected from the shaft 84 which can then be turnedindependently of the ratchet wheel 85 by turning the knob 86. Themechanism for eifecting the releasable'connection between the wheel 85and the shaft '84 is not shown in the drawings since it is of relativelyminor significance and the operation will be understood by anyoneskilled in the art.

It will be understood that as paper is removed from the stack of sheets11 by the pads 14 the table 10 must be periodically elevated so that thetop sheet in the stack 11 is maintained sufficiently close to the pads14 to be gripped thereby. The table 10'is, of course, elevated byturning the ratchet wheel 85 in the appropriate direction.

The drive for the ratchet wheel 85 is taken from the arm 48 seen inFIGURE 5 and this drive iscontrolled by the height of the top of thestack of sheetsll. An inclined blade 87 (FIGURE 3)- extends across thetop of the machine and has the upper edge thereof: fixed to a controlshaft 88 (FIGURES 3 and 5). A triangular-shaped control cam 89 has onecorner thereof fixed to an end of the shaft 88. The cam 89, shaft 88-and the blade 87 are urged in a clockwise direction (FIGURE 5) by aspring 90 secured between the cam 89 and the adjacent side member 83. Aroller 91 fixed to the central part of the cam 89 cooperates with abellcrank. lever 93 having arms 92 and 94 the latter of which isconnected by a spring 95 to the adjacent side member 83 so that thebellcrank lever 93 is urged in an anti-clockwise direction. The arm 92carries aroller 96 that is urged into contact with the underside of theadjacent arm 48.by means of the spring 95. A drive link 97. has one endpivotally secured. to the arm 48 seen in FIGURE 5 and the other end ofthe link 97 has a slot 98 "therein through which is passed a pin 99secured to the adjacent side member 83. The link 97 has a latching pawl100 pivotally secured thereto. One end of the pawl- 100 has a catch 101which cooperates with a notch 102 formed in the cam 89. A spring strip103 secured to the link 97' bears on the other end 1040f the pawl 100:tourge the catch 101 into cooperation with the notch 102; Said; other end104 is, by the spring 103, urged into contact; with a spring-loaded trippawl 105. The pawl 100 has in its underside a recess 100A adaptedtoreceive the upper end of the trip pawl 105. A stop 105Av limitsanti-clockwise movement ofthe pawl 105. Also secured on the link 97 isan operating bracket 106, this bracket having a laterally and outwardlyprojecting tongue 107 (FIGURES and 7).

A spring-loaded retainer pawl 108 is pivotally secured to the adjacentside member 83, this retainer pawl being arranged for preventinganti-clockwise (FIGURE 7) rotation of the ratchet wheel 85. An arm 109pivotally carried about the shaft 84 and urged by a spring 110 in ananti-clockwise direction (FIGURE 7) has a drive pawl 111 pivotallysecured thereto about 111A. The drive pawl 111 is arranged for advancingthe ratchet wheel 85 in a clockwise direction. The tongue 107 isarranged to encounter a projection 109A on the rear of the free end ofthe arm 109 when the drive link moves from left to right (FIGURES 5 and7). The arm 109 is provided with a tooth 112 that cooperates with thelower end of a release pawl 113 which is pivotally secured near itsupper end to the adjacent side member 83. A spring 114 urges the pawl113 in a counter-clockwise direction (FIGURES 5 and 7). The cam 89 andthe pawl 113 are co-planar and the arrangement is such that the cam 89is able to swing under the control of the spring 90 to encounter thepawl 113 and push the latter against the action of the spring 114 out ofcontact with the tooth 112 carried on the arm 109.

The drive mechanism just described with reference to FIGURES 5 and 7operates as follows. The parts in FIGURE 5 are shown in the positionwhere the suction feet 15 are most remote from the feed rollers 6 and 7and the pads 14 are in their lowest position. To feed the top sheet fromthe stack of sheets 11 to the feed rollers 6 and 7 the arm 48 is rotatedfrom the position shown in FIGURE 5 in a clockwise direction by themechanism previously described in connection with FIGURE 2. Suchmovement of the arm 43 moves the drive link 97 from left to right.Assume that initially the release pawl 113 is in engagement with thetooth 112. Left to right movement of the link 97 eventually causes thetongue 107 to encounter the projection 109A on the arm 109 whereby thelatter is turned a small angle clockwise (FIGURE 7) that the pawl 111moves slightly in a clockwise direction. The amount of movement is,however, insuflicient to advance the ratchet wheel 85 one tooth pitch sothat the retainer pawl 108 remains in cooperation with the same tooth ofthe wheel 85. During initial left to right movement of the link 97 thecam 89 is turned in an anticlockwise direction by the latching pawl 100and the blade 87 lifts from the top of the stack of sheets 11 so thatthe top sheet 11 can be freely advanced to the feed rollers 6 and 7.With continued left to right movement of the link 97 the upper end ofthe trip pawl 105 eventually snaps into the recess 100A and in so doingrocks the pawl 100 so that the catch 101 disengages from the notch 102.The cam 89, under the influence of the spring 90, swings in ananti-clockwise direction so that its lower end approaches the pawl 113.The movement of the cam 89 is arrested when the blade 87 comes to bearon the top of the stack of sheets 11. Provided the top of the stack issufficiently high for proper cooperation to take place between the pads14 and the top sheet 11 no drive is required to be imparted to theratchet wheel 85 and the cam 89 does not encounter the pawl 113. Duringthe reverse movement of the arm 48 and the link 97, the tongue 107disengages from the projection 109A but anti-clockwise movement of thearm 109 is limited by the engagement of the tooth-112 and the pawl 113.During the final part of the right to left movement of the link 97 thearm 48 encounters the roller 96 and the arm 94 swings clockwise toencounter the roller 91 and push the cam 89 in an anti-clockwisedirection whereby the notch 102 is engaged again by the catch 101.

When, following disengagement of the catch 101 and the notch 102, theclockwise movement of the cam 89 exceeds a certain amount indicatingthat the blade 87 has to travel some way before encountering the topsheet 11, the cam 89 strikes the release pawl 113 so that it disengagesfrom the tooth 112. The spring moves the arm 109 anti-clockwise asufficient amount for the pawl 111 to move onto the back of the nexttooth on the wheel 85. During the next left to right movement of thelink 97 the ratchet wheel 85 is advanced one tooth pitch, the wheel 85being maintained in its new position by the pawl 108. The wheel 85 turnsthe shaft 84 and the gearwheels 13 move the racks 12 whereby the table10 is lifted a small amount sutficient to bring the top sheet 11sufficiently close to the pads 14 for the latter satisfactorily to gripthe top sheet.

Air control The arm 48 seen in FIGURE 3 has one end of a link 1'15pivotally secured thereto, the other end of this link having a slot 116through which is passed a pin 117 fixed to the adjacent side plate 83.The link carries a lug 118 which is disposed between the two arms 119and 120 of a U-shaped bracket which is pivoted at 121 to the adjacentside plate 83. A bolt 122 is threaded through the upper end of the arm119 and the projecting part of the bolt 122 cooperates with the lug 118.A nut 123 on the bolt 122 locks the latter in the position to which itis adjusted. A bolt 124 is threaded through the arm 120 and theprojecting part of this bolt cooperates with a lug 118. A nut 125 on thebolt 124 locks the latter in the position to which it is adjusted. Apipe 126 leads from the suction side of the pump (not shown) to theinlet 127 of a valve 128, the outlet of which communicates with thetubing 17. A short open-ended tube 129 extends from the valve 128 andcooperates with a cupshaped washer 130 of rubber, leather or likematerial which is carried on a lug 130A projecting laterally from thearm 120.

During feeding of the top sheet from the stack of sheets 11, to the feedrollers 6 and 7, the arms 48 swing in a counter-clockwise direction(FIGURE 3) and the link 115 therefore moves from right to left. The lug118 disengages from the bolt 122 and near the end of thecounter-clockwise movement of the arms 48, the lug 118 encounters thebolt 124. The U-shaped bracket is thus rocked and the cup-shaped washer130 is removed from the open end of the tube 129. The tubing 17 isthereby opened to atmosphere so that the suction pads 14 drop theleading edge of the sheet 11 that has been fed to the feed rollers 6 and7. During reverse movement of the arms 48 to their initial position, thetubing 17 re mains opened to atmosphere until the lug 118 encounters thebolt 122 whereby the U-shaped bracket is rocked in the oppositedirection and the cup-shaped Washer 130 again engages over the open endof the tube 129* whereby the suction at the pads 14 is reestablished.

The delivery side of the suction pump (not shovm) is connected todeliver compressed air to jets 131 which are adjacent the front top edgeof the stack of sheets 11 and to jets 132 which are adjacent the topfront corners of the stack of sheet 1 1. The jets 131 direct a stream ofair towards the rear of the stack whilst the jets 132 direct a stream ofair towards the opposite side of the machine. These jets of air aeratethe top of the stack and facilitate separation of the top sheet 11 fromthe next sheet 11 prior to feeding of the top sheet to the feed rollers6 and 7.

It may be advantageous to weight the rear side edges of the sheets 11.To this end a shaft 132A (FIGURE 5) is provided, each end of the shaftbeing pivoted in a block 133 which is mounted in a guideway 134 formedby strips 135 secured to the adjacent side plate 83. Rearwardlyextending levers136 having downwardly depending fingers 137 are fixed tothe shaft 132A. The lower ends of the fingers 137 bear on opposite sidesof the stack to weight the rear side edges of the sheets 11.

We claim:

1. A rotary printing machine comprising in combination a frame, a tablecarried by the frame for supporting a stack of sheets of paper, a rotaryprinting couple supported by the frame, suction means for lifting thetop sheet from the stack and presenting it to the printing couple, saidmeans including a suction pad adapted to engage the top sheet of thestack, a carrier for the pad, drive means for moving the carrier,guiding means for the carrier, said guiding means embodying a slide, afirst upwardly extending guideway and a second substantiallyhorizontally extending guideway, the two guideways intersecting and theslide being arranged for movement along the guideways, there being ablock slidably fitted within the horizontally extending guideway andhaving a recess therein for receiving the slide which is adapted to fitslidably in the first guideway, the arrangement being such that thecarrier is moved first upwardly and then laterally to present a sheet tothe printing couple and then in reverse direction to return the pad intoposition for engaging the next sheet and such that, during the feedingoperation, the slide moves upwardly along the upwardly extendingguideway into the recess in the block and then the block together withthe slide is moved along the horizontally extending guideway.

2. A rotary printing machine comprising in combina tion, a frame, atable carried by the frame for supporting a stack of sheets of paper, arotary printing couple supported by the frame, suction means for liftingthe top sheet from the stack and presenting it to the printing coupleand including a suction padadapted to engage the top sheet of the stack,a carrier for the pad, drive means for moving the carrier, guiding meansfor the carrier operating to guide it upon movement thereof firstupwardly then laterally to present a sheet to the printing couple andthen in the reverse direction to return the pad into position forengaging the next sheet, said drive means including a link which isarranged to be reciprocated in the general direction of the length ofthe link, the drive being imparted to the link through a pivotalconnection at one end thereof, a driving arm operatively connected tosaid carrier, the other end of the link having a pin and notchconnection with said driving arm, there being means for pressing the pininto engagement with the notch and the notch being shaped such thatduring operation of the drive means, when the pressing means isoperative, the drive is transmitted from the link to the driving arm andwhen the pressing means is inoperative the pin rides out of the notchand the drive is not transmitted from the link to the driving arm.

3. A machine according to claim 1, wherein the suction pad is carried bya supporting member which is fixed to the slide.

4. A machine according to claim 1, wherein the suction pad is carriedupon a shaft which is fixed to the slide, and wherein guiding means areprovided for guiding the other end of the shaft to move along a pathparallel to that of the first-mentioned end of the shaft.

5. A rotary printing machine comprising in combination a frame, a tablecarried by the frame for supporting a stack of sheets of paper, a rotaryprinting couple supported by the frame, and suction means for liftingthe top sheet from the stack and presenting it to the printing couple,said suction means including a suction pad adapted to engage the topsheet of the stack, a carrier for the pad, drive means for moving thecarrier, said drive means being operatively coupled to said printingcouple for actuation of said drive means, and other means for guidingthe carrier to move it first upwardly and then laterally to present asheet to the printing couple, and then in the reverse direction toreturn said pad into position for engaging the next sheet, said othermeans comprising a pair of intersecting slotted guideways, including afirst substantially horizontally extending guideway and a secondupwardly extending guideway, a first member disposed in said firstguideway for movement therealong, said first member having a recesstherein defining an extension of said second guideway, a second memberdisposed in said second guideway for movement therealong and into andout of said recess, and said carrier being attached to said secondmember for movement with said second and said first members.

6. A machine in accordance with claim 5, wherein the drive means formoving the carrier includes a driving arm, one end of which is pivotedto said frame, and a second arm one end of which is pivoted to saiddriving arm, and the other end of said second arm being operativelyconnected to said second member for actuating said first and said secondmembers.

7. 'A machine in accordance with claim 5, wherein a roller is positionedon the side of the carrier opposite to said second member connectedside, for engaging another set of intersecting slotted guidewaysarranged in a generally similar manner as said first mentioned pair ofslotted guideways, said roller and corresponding guideways operating toaid in guiding said carrier for movement first upwardly and thenlaterally to present a sheet to the printing couple, and then in thereverse direction to return said pad into position for engaging the nextsheet.

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